Introduction

Atrial standstill (AS) is a rare clinical condition characterized by absence of the electrical and mechanical activity of the atrial myocardium, and the spatial distribution of atrial lesion can be diffuse or partial.1 Prior cases of AS have been reported in the adult literature with tachyarrhythmias.2 Several cases of AS have been described in acute myocarditis, hypertrophic cardiomyopathy or dilated cardiomyopathy.2,3 AS was characterized by the absence of P-waves in the electrocardiogram (ECG) and lack of atrial contraction in the echocardiogram. However, intracardiac electrophysiological examination in AS has not been reported. In the present study, we report a case of left atrial standstill with paroxysmal atrial fibrillation (AF) and atrial flutter (AFL) who successfully received radiofrequency ablation.